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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Astral on April 07, 2010, 01:57:07 PM

Title: Accelerated A1200 motherboard?
Post by: Astral on April 07, 2010, 01:57:07 PM
Just had an idea and maybe the techies can answer whether it is possible/practical?

Is it possible to overclock the standard 68020 CPU on the A1200 motherboard, by say, lifting the clock signal pin and feeding it a modified clock signal - whether the signal be completely generated elsewhere or based on the onboard 28 (?) mhz crystal?

I'm thinking something like going from the standard 14mhz to 28mhz. Even if it's not quite that simple, is it still something worth considering looking into?

I'm just thinking it might be a cheap and practical way to speed up an A1200 as I know an A1200 with a 28mhz 020 accelerator and fast ram combo gives a surprising speed improvement...
Title: Re: Accelerated A1200 motherboard?
Post by: A6000 on April 07, 2010, 02:02:07 PM
A simple 4/8MB ram card will nearly double the speed of your A1200 and allow many programs that need more than 2mb, to run.
Title: Re: Accelerated A1200 motherboard?
Post by: ElPolloDiabl on April 07, 2010, 02:25:56 PM
After you double it, the only speed increase you get is from the tiny cache being twice as fast. If you want a noticeable performance increase you have to speed up the main memory too.

Soo, not worth it.
Title: Re: Accelerated A1200 motherboard?
Post by: Philophus on April 07, 2010, 02:39:47 PM
Not possible..the xtal will overclock all motherboard and custom chips will cease to function how they should.